I love the way Hepburn describes Bogart in this book, which she wrote almost thirty years after the film was made: He walked straight down the center of the road— No maybes. Yes or no. He liked to drink. He drank. He liked to sail a boat. He sailed a boat. He was an actor. He was happy and proud to be an actor. He'd say to me, "Are you comfortable? Everything O.K.?" He was looking out for me. "Need anything?" To put it simply: There was no bunk about Bogie. He was a man.
'The African Queen' - Bogart, Hepburn and the Little Boat That Could
The African Queen is one of my favorite classic romantic movies, it's about a middle-aged spinster and an rough guy who tips the bottle more than a bit. They fall in love despite or maybe because of being total opposites.